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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package calculator.security;
import java.security.Principal;
import java.util.Map;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
/**
* @version $Rev$ $Date$
*/
public class JaasLoginModule implements LoginModule {
private CallbackHandler callbackHandler;
private Subject subject;
private Principal userPrincipal;
private String userId;
private String password;
private boolean succeeded;
private boolean commitSucceeded;
public void initialize(Subject subject,
CallbackHandler callbackHandler,
Map<String, ?> sharedState,
Map<String, ?> options) {
this.callbackHandler = callbackHandler;
this.subject = subject;
}
public boolean login() throws LoginException {
Callback[] callbacks = new Callback[2];
callbacks[0] = new NameCallback("UserId:");
callbacks[1] = new PasswordCallback("Password:", false);
try {
callbackHandler.handle(callbacks);
userId = ((NameCallback)callbacks[0]).getName();
password = new String(((PasswordCallback)callbacks[1]).getPassword());
if (userId.equals("CalculatorUser") && password.equals("CalculatorUserPasswd")) {
System.out.println("Successfully AUTHENTICATED!!");
succeeded = true;
return true;
} else {
System.out.println("Incorrect userId / password! AUTHENTICATION FAILED!!");
return false;
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* <p> This method is called if the LoginContext's
* overall authentication succeeded
* (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules
* succeeded).
*
* <p> If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* <code>login</code> method), then this method associates a
* <code>UserPrincipal</code>
* with the <code>Subject</code> located in the
* <code>LoginModule</code>. If this LoginModule's own
* authentication attempted failed, then this method removes
* any state that was originally saved.
*
* <p>
*
* @exception LoginException if the commit fails.
*
* @return true if this LoginModule's own login and commit
* attempts succeeded, or false otherwise.
*/
public boolean commit() throws LoginException {
if (succeeded == false) {
return false;
} else {
// add a Principal (authenticated identity) to the Subject
// assume the user we authenticated is the UserPrincipal
userPrincipal = new UserPrincipal(userId);
if (!subject.getPrincipals().contains(userPrincipal))
subject.getPrincipals().add(userPrincipal);
// in any case, clean out state
userId = null;
password = null;
commitSucceeded = true;
return true;
}
}
/**
* <p> This method is called if the LoginContext's
* overall authentication failed.
* (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules
* did not succeed).
*
* <p> If this LoginModule's own authentication attempt
* succeeded (checked by retrieving the private state saved by the
* <code>login</code> and <code>commit</code> methods),
* then this method cleans up any state that was originally saved.
*
* <p>
*
* @exception LoginException if the abort fails.
*
* @return false if this LoginModule's own login and/or commit attempts
* failed, and true otherwise.
*/
public boolean abort() throws LoginException {
if (succeeded == false) {
return false;
} else if (succeeded == true && commitSucceeded == false) {
// login succeeded but overall authentication failed
succeeded = false;
userId = null;
password = null;
userPrincipal = null;
} else {
// overall authentication succeeded and commit succeeded,
// but someone else's commit failed
logout();
}
return true;
}
/**
* Logout the user.
*
* <p> This method removes the <code>SimplePrincipal</code>
* that was added by the <code>commit</code> method.
*
* <p>
*
* @exception LoginException if the logout fails.
*
* @return true in all cases since this <code>LoginModule</code>
* should not be ignored.
*/
public boolean logout() throws LoginException {
subject.getPrincipals().remove(userPrincipal);
succeeded = false;
succeeded = commitSucceeded;
userId = null;
if (password != null)
password = null;
userPrincipal = null;
return true;
}
}
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